What steps can be taken to troubleshoot and debug PHP code that is not writing form data to a text file as expected?

To troubleshoot and debug PHP code that is not writing form data to a text file as expected, you can start by checking for any errors in the code, ensuring that the file permissions are set correctly, and verifying that the form data is being properly retrieved and processed. Additionally, you can use functions like error_log() or var_dump() to output debug information and track the flow of the code. 

<?php
// Check for errors
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Verify form data is being properly retrieved
if(isset($_POST['submit'])){
    $data = $_POST['data'];

    // Ensure file permissions are set correctly
    $file = 'data.txt';
    if(file_put_contents($file, $data, FILE_APPEND)){
        echo "Data written to file successfully.";
    } else {
        echo "Error writing data to file.";
    }
}
?>

Keywords

PHP debugging troubleshooting form data text file

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